.field{
  width: 100%;
}
.button{
  margin-top: 30rpx;
  display: flex;
  justify-content: center;
}
.add_button{
  width: 90%;
  
}
.aa{
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 100rpx;
  display: flex;
  justify-content: center;
  align-items: center;
  /* 底部安全距离 */
  padding-bottom:env(safe-area-inset-bottom);
  padding-bottom:constant(safe-area-inset-bottom);
  }